摘要
^(14)C-代森锰锌可被蕃茄根叶吸收,在叶片上和土壤中的残留半衰期分别是9.5和7.6d,在土壤中两周内的淋溶距离可达28cm,但90％的代森锰锌残留仍滞留在0—6cm的表层内。代森锰锌在果皮上的沉积和在体内的转移特别是包括乙撑硫脲(ETU)的水溶性代谢物的转移是导致蕃茄果实污染的重要原因。果皮上的代森锰锌残留水平比果肉高,但水洗可除去50％以上。也发现烹饪过程中,20—30％的代森锰锌残留降解生成ETU。
Half-life values for total mancozeb residues on tomato leaves and soil were measured to be 9.5 and 7.6 days respectively. Leaching of residual mancozeb in soil was observed. Mancozeb deposition on the fruit skin, and in particular the water-soluble metabolites like ETU(ethylene thiourea) transferred throughout the plants would be the main sources of contamination of tomato fruits. The fruit skin contained higher levels of residue than the pulp, and by washing with water more than 50% of the residue could be removed. It was also found that 20-30% of the residual mancozeb degraded to ETU during cooking process.
出处
《核技术》
CAS
CSCD
北大核心
1991年第1期62-64,F003,共4页
Nuclear Techniques
基金
FAO/IAEA组织的国际合作项目
关键词
代森锰锌
碳14
蕃茄
土壤
残瘤
Radiotracer technique Mancozeb residues ETU
